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利用LUMEX915和多接收等离子体质谱(MC-ICP-MS)等仪器,分别对红原一个约150a(210Pb定年)时间跨度的泥炭剖面进行总汞含量和汞同位素比值测定.发现泥炭中汞含量从底部到表层逐渐增加,汞同位素δ202Hg从底部至表层呈变轻的趋势,变化范围分别在16.7～101.3ng/g和(-0.44‰±0.14‰)～(-1.45‰±0.22‰)之间.研究结果表明,工业革命不仅使研究区大气受到明显汞的污染,也使汞同位素组成呈现出变轻的趋势,这说明人类活动排放的汞同位素与自然排放的汞同位素有差异.
The total mercury and mercury isotope ratio of peat profiles of red clayey with a spans of about 150a (210Pb) were measured by LUMEX915 and multi-receiver plasma mass spectrometry (MC-ICP-MS) From the bottom to the surface, the δ (superscript 2 +) Hg isotope δ202Hg tended to decrease from the bottom to the surface, ranging from 16.7 to 101.3 ng / g and (-0.44 ‰ ± 0.14 ‰) to (-1.45 ‰ ± 0.22 ‰), respectively. The results show that the industrial revolution not only caused significant mercury pollution in the atmosphere of the study area, but also made the mercury isotope composition lighter. This indicates that the mercury isotopes emitted by human activities are different from the naturally-emitted mercury isotopes.